Abstract: A device for detecting a vehicle engine state includes a power input terminal and a power monitoring unit. The power input terminal is electrically connected to a battery. The power monitoring unit is electrically connected to the power input terminal and configured to detect a battery voltage of the battery and to update a standby threshold voltage predefined in the power monitoring unit according to a standby level of the battery in a steady state whenever an engine shuts down. The power monitoring unit is configured to compare the detected battery voltage and the updated standby threshold voltage, and to determine if the engine is activated according to a result of the comparison. A vehicle engine state detecting method is also disclosed herein.

Abstract: A collision detecting method, an electronic device, and a computer program product thereof are provided for the electronic device having an accelerometer, a positioning module, and a communication module. The method includes obtaining a plurality of acceleration variations within each of a plurality of sampling intervals respectively detected by the accelerometer. The method also includes transforming the corresponding acceleration variations into a plurality of frequency domain signals for each sampling interval, and calculating energy and entropy of the frequency domain signals. The method further includes determining a collision has occurred if the energy and the entropy corresponding to each of a plurality of specific sampling intervals among the sampling intervals both drastically increase then drastically decrease suddenly.

Abstract: A mobile positioning apparatus, a server, and a mobile positioning method are provided. The mobile positioning apparatus can catch an environment image of the mobile positioning apparatus, retrieve a positioning marker from the environment image, and receive the positioning data from the server. Then the mobile positioning apparatus can calculate a current position of the mobile positioning apparatus according to the positioning marker and the positioning data.